src/restraints/ThermoIntegrationForceManager.cpp

/*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *                                                                      
 * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
 * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
 * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
 * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
 * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
 */
 

#include "restraints/ThermoIntegrationForceManager.hpp"

#ifdef IS_MPI
#include <mpi.h>
#endif

namespace OpenMD {
  
  ThermoIntegrationForceManager::ThermoIntegrationForceManager(SimInfo* info): 
    RestraintForceManager(info){
    currSnapshot_ = info_->getSnapshotManager()->getCurrentSnapshot();
    simParam = info_->getSimParams();
    
    if (simParam->haveThermodynamicIntegrationLambda()){
      tIntLambda_ = simParam->getThermodynamicIntegrationLambda();
    }
    else{
      tIntLambda_ = 1.0;
      sprintf(painCave.errMsg,
              "ThermoIntegration error: the transformation parameter\n"
              "\t(lambda) was not specified. OpenMD will use a default\n"
              "\tvalue of %f. To set lambda, use the \n"
              "\tthermodynamicIntegrationLambda variable.\n",
              tIntLambda_);
      painCave.isFatal = 0;
      simError();
    }
    
    if (simParam->haveThermodynamicIntegrationK()){
      tIntK_ = simParam->getThermodynamicIntegrationK();
    }
    else{
      tIntK_ = 1.0;
      sprintf(painCave.errMsg,
              "ThermoIntegration Warning: the tranformation parameter\n"
              "\texponent (k) was not specified. OpenMD will use a default\n"
              "\tvalue of %f. To set k, use the thermodynamicIntegrationK\n"
              "\tvariable.\n",
              tIntK_);
      painCave.isFatal = 0;
      simError();      
    }
    
    // build the scaling factor used to modulate the forces and torques
    factor_ = pow(tIntLambda_, tIntK_);
  }
  
  ThermoIntegrationForceManager::~ThermoIntegrationForceManager(){
  }
  
  void ThermoIntegrationForceManager::calcForces(){
    Snapshot* curSnapshot;
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::IntegrableObjectIterator ii;
    StuntDouble* sd;
    Vector3d frc;
    Vector3d trq;
    Mat3x3d tempTau;
    
    // perform the standard calcForces first
    ForceManager::calcForces();
    
    curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();

    // now scale forces and torques of all the sds
      
    for (mol = info_->beginMolecule(mi); mol != NULL; 
         mol = info_->nextMolecule(mi)) {

      for (sd = mol->beginIntegrableObject(ii); sd != NULL; 
           sd = mol->nextIntegrableObject(ii)) {

        frc = sd->getFrc();
        frc *= factor_;
        sd->setFrc(frc);
        
        if (sd->isDirectional()){
          trq = sd->getTrq();
          trq *= factor_;
          sd->setTrq(trq);
        }
      }
    }
    
    // set rawPotential to be the unmodulated potential
    lrPot_ = curSnapshot->getLongRangePotential();
    curSnapshot->setRawPotential(lrPot_);
    
    // modulate the potential and update the snapshot
    lrPot_ *= factor_;
    curSnapshot->setLongRangePotential(lrPot_);
    
    // scale the pressure tensor
    tempTau = curSnapshot->getStressTensor();
    tempTau *= factor_;
    curSnapshot->setStressTensor(tempTau);

    // now, on to the applied restraining potentials (if needed):
    RealType restPot_local = 0.0;
    RealType vHarm_local = 0.0;
    
    if (simParam->getUseRestraints()) {
      // do restraints from RestraintForceManager:
      restPot_local = doRestraints(1.0 - factor_);      
      vHarm_local = getUnscaledPotential();
    }
      
#ifdef IS_MPI
    RealType restPot;
    MPI::COMM_WORLD.Allreduce(&restPot_local, &restPot, 1, 
                              MPI::REALTYPE, MPI::SUM);
    MPI::COMM_WORLD.Allreduce(&vHarm_local, &vHarm_, 1, 
                              MPI::REALTYPE, MPI::SUM);         
    lrPot_ += restPot;
#else
    lrPot_ += restPot_local;
    vHarm_ = vHarm_local;
#endif

    // give the final values to stats
    curSnapshot->setLongRangePotential(lrPot_);
    curSnapshot->setRestraintPotential(vHarm_);
  }  
}
Revision:	1782
Committed:	Wed Aug 22 02:28:28 2012 UTC (13 years, 2 months ago) by gezelter
File size:	5979 byte(s)
Log Message:	MERGE OpenMD development branch 1465:1781 into trunk
#	Content
1	/*
2	* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3	*
4	* The University of Notre Dame grants you ("Licensee") a
5	* non-exclusive, royalty free, license to use, modify and
6	* redistribute this software in source and binary code form, provided
7	* that the following conditions are met:
8	*
9	* 1. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	*
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the
15	* distribution.
16	*
17	* This software is provided "AS IS," without a warranty of any
18	* kind. All express or implied conditions, representations and
19	* warranties, including any implied warranty of merchantability,
20	* fitness for a particular purpose or non-infringement, are hereby
21	* excluded. The University of Notre Dame and its licensors shall not
22	* be liable for any damages suffered by licensee as a result of
23	* using, modifying or distributing the software or its
24	* derivatives. In no event will the University of Notre Dame or its
25	* licensors be liable for any lost revenue, profit or data, or for
26	* direct, indirect, special, consequential, incidental or punitive
27	* damages, however caused and regardless of the theory of liability,
28	* arising out of the use of or inability to use software, even if the
29	* University of Notre Dame has been advised of the possibility of
30	* such damages.
31	*
32	* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33	* research, please cite the appropriate papers when you publish your
34	* work. Good starting points are:
35	*
36	* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
37	* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
38	* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39	* [4] Kuang & Gezelter, J. Chem. Phys. 133, 164101 (2010).
40	* [5] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41	*/
42
43
44	#include "restraints/ThermoIntegrationForceManager.hpp"
45
46	#ifdef IS_MPI
47	#include <mpi.h>
48	#endif
49
50	namespace OpenMD {
51
52	ThermoIntegrationForceManager::ThermoIntegrationForceManager(SimInfo* info):
53	RestraintForceManager(info){
54	currSnapshot_ = info_->getSnapshotManager()->getCurrentSnapshot();
55	simParam = info_->getSimParams();
56
57	if (simParam->haveThermodynamicIntegrationLambda()){
58	tIntLambda_ = simParam->getThermodynamicIntegrationLambda();
59	}
60	else{
61	tIntLambda_ = 1.0;
62	sprintf(painCave.errMsg,
63	"ThermoIntegration error: the transformation parameter\n"
64	"\t(lambda) was not specified. OpenMD will use a default\n"
65	"\tvalue of %f. To set lambda, use the \n"
66	"\tthermodynamicIntegrationLambda variable.\n",
67	tIntLambda_);
68	painCave.isFatal = 0;
69	simError();
70	}
71
72	if (simParam->haveThermodynamicIntegrationK()){
73	tIntK_ = simParam->getThermodynamicIntegrationK();
74	}
75	else{
76	tIntK_ = 1.0;
77	sprintf(painCave.errMsg,
78	"ThermoIntegration Warning: the tranformation parameter\n"
79	"\texponent (k) was not specified. OpenMD will use a default\n"
80	"\tvalue of %f. To set k, use the thermodynamicIntegrationK\n"
81	"\tvariable.\n",
82	tIntK_);
83	painCave.isFatal = 0;
84	simError();
85	}
86
87	// build the scaling factor used to modulate the forces and torques
88	factor_ = pow(tIntLambda_, tIntK_);
89	}
90
91	ThermoIntegrationForceManager::~ThermoIntegrationForceManager(){
92	}
93
94	void ThermoIntegrationForceManager::calcForces(){
95	Snapshot* curSnapshot;
96	SimInfo::MoleculeIterator mi;
97	Molecule* mol;
98	Molecule::IntegrableObjectIterator ii;
99	StuntDouble* sd;
100	Vector3d frc;
101	Vector3d trq;
102	Mat3x3d tempTau;
103
104	// perform the standard calcForces first
105	ForceManager::calcForces();
106
107	curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
108
109	// now scale forces and torques of all the sds
110
111	for (mol = info_->beginMolecule(mi); mol != NULL;
112	mol = info_->nextMolecule(mi)) {
113
114	for (sd = mol->beginIntegrableObject(ii); sd != NULL;
115	sd = mol->nextIntegrableObject(ii)) {
116
117	frc = sd->getFrc();
118	frc *= factor_;
119	sd->setFrc(frc);
120
121	if (sd->isDirectional()){
122	trq = sd->getTrq();
123	trq *= factor_;
124	sd->setTrq(trq);
125	}
126	}
127	}
128
129	// set rawPotential to be the unmodulated potential
130	lrPot_ = curSnapshot->getLongRangePotential();
131	curSnapshot->setRawPotential(lrPot_);
132
133	// modulate the potential and update the snapshot
134	lrPot_ *= factor_;
135	curSnapshot->setLongRangePotential(lrPot_);
136
137	// scale the pressure tensor
138	tempTau = curSnapshot->getStressTensor();
139	tempTau *= factor_;
140	curSnapshot->setStressTensor(tempTau);
141
142	// now, on to the applied restraining potentials (if needed):
143	RealType restPot_local = 0.0;
144	RealType vHarm_local = 0.0;
145
146	if (simParam->getUseRestraints()) {
147	// do restraints from RestraintForceManager:
148	restPot_local = doRestraints(1.0 - factor_);
149	vHarm_local = getUnscaledPotential();
150	}
151
152	#ifdef IS_MPI
153	RealType restPot;
154	MPI::COMM_WORLD.Allreduce(&restPot_local, &restPot, 1,
155	MPI::REALTYPE, MPI::SUM);
156	MPI::COMM_WORLD.Allreduce(&vHarm_local, &vHarm_, 1,
157	MPI::REALTYPE, MPI::SUM);
158	lrPot_ += restPot;
159	#else
160	lrPot_ += restPot_local;
161	vHarm_ = vHarm_local;
162	#endif
163
164	// give the final values to stats
165	curSnapshot->setLongRangePotential(lrPot_);
166	curSnapshot->setRestraintPotential(vHarm_);
167	}
168	}